Fire-pot.



No. 815,959.v

III/II.

PATENTBD MAR. 27, 1906. R; M. HI'NMAN.

FIRE POT.

APPLIOATION FILED JAN. .18, 1905;

ROBERT M. HINMAN, OF AKRON, OHIO.

FIRE-POT.

' Specification of Letters Patent.

Patented March 27, 1906.

Application filed January 18. 1905. serial No. 241,635.

T on whom it may concern:

Be it known that I, ROBERT M. HINMAN, a citizen of the United States,residing at Akron, in the county of Summit and State of Ohio, haveinvented a certain new and useful Im-' provement in Fire-Pots, of whichthefollowing is a complete specification.

' This invention relates to fire-pots for stoves and furnaces, and hasfor its object the production of an improved fire pot especially adaptedfor using soft coal, wherein it is de 'sirable to introduce airtosu'pply the requirements of combustion at the sides of the firepot andintermediate the bottom and top thereof inaddition to the air introducedinto the fuel from below the grate to produce economic and smokelesscombustion of the fuel. Another object is to make this fire-pot of[simple construction, so as to be readily manufactured and repaired, andto provide it with a removable lining, which may be replaced asfrequently as the needs of the case require,

thereby making the stove or furnace in which it is used more durable.

A further object is to provide means for temporarily sustaining thefire-pot lining in position While erecting the furnace or repairingthevsame and independent means for supporting this lining when the stoveor furnace is actively operated after it is completely set up in such amanner as to permit the expansion of this lining, dueto excessive heat,without injury to the integrity of the main wall of the fire-pot.

In accomplishing the before-mentioned objects I employ certain novel andpeculiar features, hereinafter more fully described, reference being hadto the accompanying drawings, forming a part hereof.

In the accompanying drawings, in which similar reference-numeralsindicate like parts in the different figures, Figure 1 is a verticalcentral section of my improved fire-pot resting on the ash-pit with thelining temporarily held in position to permit the insertion of themechanism for permanently retaining the lining in position andsustaining the grate- Fig. 2 is a similarview of the fire-pot and ashpit with the lining resting upon its permanent seat and detached fromengagement with the temporary sustaining mechanism,

only two supporting-arms being shown. Fig; 3 is a plan view ofthepermanent seat for the lining of the fire-pot, as well as thegrate-sustaining mechanism; and Fig. 4, aportion of the outer side wallof the fire-pot lining.

In the drawings, 1 is an ash-pit, which may be of any preferred ordesired description best suited to the work required thereof andprovided on its upper edge with anannular groove',into which seats thelower end of the main body of the fire-pot 2.

The wall 5 of the firepot above the ash-pit converges slightly, and fromthis extends upwardly an approximately cylindrical portion 3. Thisinwardly-converging portion of the fire-pot is provided atproperly-spaced intervals with inwardly-projecting lugs 4, for a purposeto be later described.

The lining proper of the fire-pot consists of an annularly-constructedmember 5, having in the lower portion of the side walls thereofupwardly-extending slots 6, forming teeth at the lower edge thereof.From the upper outer edge of this lining 5 is an annulardownwardly-curved rim 7, having an outer configuration similar inconformation to the inner surface of the converging portion of thefire-pot'Z. Extending from the top tothe bottom of the lining '5 and onthe outside thereof are strengthening-ribs 8, made integral with thebody of the lining 5. At properly-arranged intervals through the rim 7are cut notches 9 of suflicient width to readily pass over the lugs 4 onthe under converging sides of the fire-pot 2. In erecting or puttingtogether a stove or furnace having this construction the lining isinserted into the ashpit with the rim 7 at the top and raised'verticallywith the notches 9 so disposed as 'to straddle the lugs 4, and when therim 7 is seated on the under face of the converging portion of thefire-pot 2 the lining is given a partial revolution, causing the loweredge of the rim 7 to ride over and cooperate with the lugs 4. to sustainit temporarilyin-position. It will be obvious from the descriptionheretofore given that when this lining seats firmly againstthe underface of this converging portion of the fire-pot 2 it will receive anexcessive amount of heat generated by the combustion of'the fuel, andhence will-expand to a greater degree than the main portion of thefire-pot, and this would result in the frequent cracking or breakingthereof. To avoid this, I make use of certain mechanism, which is theermanent support of this lining and whic allows the complete expansionof the same without injury to the main body of the fire-pot.

Atdeterminate intervals on the inner sides of the wall of the ash-pit lare lugs 10, and V upon these lugs are seated the lower ends of arms 11,projecting radially from a ring 12, provided with an outer beading 13.In placing this ring in position it is raised vertically from the floorof the ash-pit in such a way that the arms 11 will miss the lugs 10 andwhen at a sufficient height is given a partial revolution, which causesthe lower ends of the arms 11 to cooperate with the upper faces of thelugs 10, thereby suitably sustaining the ring and its integral arms inposition in the upper portion of the ash-pit 1. The lining 5 is thengiven a partial revolution sufficient to cause the notches 9 to straddlethe lugs 4 and permit the lowering of the lining 5 a slightdistance,which causes the lower points or edges of the teeth formed bythe slots 6 to rest upon the ring 12 and be there retained fromdisplacement by means of the heading 13. In manufacturing this ring 12 Ipreferably make integral therewith the-internally-projecting arms 14,having in their inner ends pockets 15, in which are j ournaled shafts 16of friction-reducing balls 17. Any suitable form of grate 18 may beprovided for use in connection with this fire-pot, and I customarilyprovide on the under face of this grate a series of curved lugs 19,having their lower faces formed to ride on the upper surfaces of thefriction-reducing balls 17.

It is obvious, of course, that any ordinary means for rotating thisgrate may be provided which the fancy of the user or requirements of thecase may deem best. It is of course apparent that any suitable number ofball-bearing arms 14 may be employed which will best subserve therequirements of the user of the device, and while only two arms 14 areillustrated in Fig. 2 of the drawings it will be obvious that three ormore supporting-arms 14 may be employed without in any manner departingfrom this invention.

It will be seen from the foregoing description that the lowering of thelining 5 from contact with the converging under face of the fire-pot 2removes the danger of breakage of the fire-pot by the expansion of thelining 5 and also permits the ingress of air to the fuel within thelining 5 through the space existing between the rim 7 and the undersurface of the converging portion of the lire-pot. In removing thislining the operation is the exact reverse of that employed for placingit in position, which can readily be followed by any one skilled in theart to which this invention appertains.

What I claim, and desire to secure by Letters Patent, is

1. In a device of the class described, the combination of an ash-pit, afire-pot suitably supported thereon, a removable slotted lining for saidfire-pot and an annular device for supporting said lining, said lire-potbeing provided on its inner face with means for supporting said lining,said ash-pit being provided with means for supporting said annulardevice, and said lining being formed to be temporarily supported by thefire-pot or to be permanently supported u )on the annular device and outof contact with the fire-pot.

2. In a device of the class described, the combination of an ash-pit, afire-pot suitably supported. thereby, a removable lining for saidfire-pot and a device for supporting said lining, said fire pot beingprovided with means for supporting the lining, said ash-pit beingprovided with means for supporting said device, said lining being formedto be temporarily supported by the fire-pot, or to be permanentlysupported by said device out of contact with the fire-pot.

In testimony that I claim the above I hereunto set my hand in thepresence of two subscribing witnesses.

ROBERT M. HINMAN.

Witnesses:

C. E. HUMPHREY, GLENARA Fox.

